“Game of Thrones,” HBO’s insanely popular television series, has finally ended after eight seasons that gripped viewers the world over. While some, like “Seinfeld’s” Jason Alexander, have defended the controversial final season, at least a million others were so unhappy with the denouement to the series that they signed a petition to have the entire eighth season redone. Hate it or love it, about 13.6 million people around the world watched the finale of “Game of Thrones”...